US4900237A - Rolling rotor motor balancing means - Google Patents

Rolling rotor motor balancing means Download PDF

Info

Publication number
US4900237A
US4900237A US07/266,425 US26642588A US4900237A US 4900237 A US4900237 A US 4900237A US 26642588 A US26642588 A US 26642588A US 4900237 A US4900237 A US 4900237A
Authority
US
United States
Prior art keywords
rotor
shafts
pair
rolling
rolling rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/266,425
Other languages
English (en)
Inventor
Wayne R. Reedy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carrier Corp
Original Assignee
Carrier Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carrier Corp filed Critical Carrier Corp
Priority to US07/266,425 priority Critical patent/US4900237A/en
Assigned to CARRIER CORPORATION, A DE CORP. reassignment CARRIER CORPORATION, A DE CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: REEDY, WAYNE R.
Priority to JP1284664A priority patent/JPH06101921B2/ja
Priority to BR898905620A priority patent/BR8905620A/pt
Priority to KR1019890015792A priority patent/KR920000686B1/ko
Priority to IT02224789A priority patent/IT1237677B/it
Application granted granted Critical
Publication of US4900237A publication Critical patent/US4900237A/en
Assigned to CARRIER CORPORATION, A CORP. OF DELAWARE reassignment CARRIER CORPORATION, A CORP. OF DELAWARE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: REEDY, WAYNE R.
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K27/00—AC commutator motors or generators having mechanical commutator
    • H02K27/30—Structural association with auxiliary mechanical devices, e.g. with clutches or brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/0085—Prime movers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/06—Rolling motors, i.e. motors having the rotor axis parallel to the stator axis and following a circular path as the rotor rolls around the inside or outside of the stator ; Nutating motors, i.e. having the rotor axis parallel to the stator axis inclined with respect to the stator axis and performing a nutational movement as the rotor rolls on the stator

Definitions

  • a rolling rotor motor is one in which only a portion of the windings are activated at any given time and the resultant asymmetric magnetic field is moved around the stator by changing which ones of the windings are the activated windings.
  • This type of motor is characterized by high torque and low speed.
  • the rotor is located internally of the stator, the coaction between the rotor and stator as a result of the asymmetric magnetic field, unless otherwise limited, is like that of the piston and cylinder of a rolling piston or reciprocating vane type compressor.
  • the rotor may also be the piston of a rolling piston compressor such as is disclosed in U.S. Pat. No. 2,561,890. Since the rotor rolls around the stator, there are low bearing loads as compared to a motor in which the rotor is constrained to rotate about a fixed axis.
  • the rolling rotor motor can be integral with the compressor thereby reducing the size and number of parts such as shafts and bearings, but it has some inherent disadvantages. Because only some of the windings are activated at any particular time, the output torque per pound of motor weight is less than it would be for an induction motor. Also, the rotor is dynamically unbalanced since its center traces a circular orbit as it moves circumferentially towards the activated windings due to magnetic attraction as it follows the rotating field. The unbalance forces increase with the square of the rotor speed thus making the motor unsuitable for high speed applications.
  • a short axial shaft is provided on each end of the rolling rotor and serves as a bearing surface for mounting a counterweight.
  • Short shafts on the end frames serve to constrain the counterweights so that their masses are always located diametrically opposite the rotor mass relative to their rotational center line defined by the short shafts on the end frame.
  • the drive for each of the counterweights is a pin in a slot, so that the counterweights maintain angular alignment.
  • the rotor is free to change its radius of operation such as rolling over foreign material on the inside of the stator or a liquid slug when used as a compressor.
  • the center of the rotor of a rolling rotor motor and a counterweight are located on diametrically opposite sides of the short shafts on the end frame.
  • the rotor alone or the rotor and counterweight are able to move radially to change their rotation arm and thereby accommodate foreign/incompressible material at the point of contact between the rotor and stator.
  • FIG. 1 is a circuit diagram for a rolling rotor motor/compressor
  • FIG. 2 is a more detailed view of the switching portion of the circuit of FIG. 1;
  • FIG. 3 is a graph showing the actuation of the switches as a function of time in the on at off mode
  • FIG. 4 is a graph showing the actuation of the switches as a function of time in the on before off mode
  • FIG. 5 is a vertical section of a rolling rotor motor/compressor taken along line 5--5 of FIG. 6;
  • FIG. 6 is a horizontal section taken along line 6--6 of FIG. 5;
  • FIG. 7 is a vertical section of a modified rolling rotor motor/compressor taken along line 7--7 of FIG. 8;
  • FIG. 8 is a horizontal section taken along line 8--8 of FIG. 7.
  • the numeral 10 generally designates a rolling rotor motor/compressor which has a plurality of windings with six, 11-1 to 6, being illustrated.
  • Power from power supply 12 is supplied to windings 11-1 to 6 by power switch module 14 under the control of switching logic module 16.
  • the power supply 12 is connected to windings 11-1 to 6 through switches 14-1 to 6 which are controlled by switching logic module 16.
  • Switch 14-1 is illustrated as solenoid actuated but any suitable power switching may be employed.
  • Switches 14-1 to 6, as illustrated in FIG. 3 can be actuated in an "on at off" mode wherein the shutting off of power to one winding coincides with the supplying of power to the next winding.
  • switches 14-1 to 6 can be actuated in an "on before off” mode wherein power is supplied to a winding for a short period of time after power is supplied to the next winding.
  • the numeral 10 generally designates a rolling rotor motor/compressor which includes a stator 20 with a base 20-1 and windings 11, and a rotor/piston 21 having short axial shafts 21-1 and 2.
  • Rotor/piston 21 and bore 20-1 together define a lunette shaped space or chamber 28 during operation.
  • Space or chamber 28 defines the air gap of the motor and the suction and/or discharge chamber of the compressor.
  • Short shafts 21-1 and 2 are rotatably received in bores 30-1 and 40-1, respectively of counterweights 30 and 40.
  • End frames 24 and 26 define the top and bottom, respectively, of hermetic shell 22 and have axial shafts 24-1 and 26-1 and provide a chamber for counterweights 30 and 40, respectively.
  • Axial shafts 24-1 and 26-1 coact with slots 30-2 and 40-2 to provide a pivot for the rotor 21 and counterweights 30 and 40 while permittinq radial movement of the rotor 21 and counterweights 30 and 40 as a unit.
  • rotor/piston 21 In operation, as the magnetic field moves about the stator 20 through the selective activation of some of the windings, as described above, rotor/piston 21 tends to follow the magnetic field and coacts with the base 20-1 of stator 20 in the manner of the coaction of the piston and cylinder of a rolling piston compressor.
  • the rotor/piston 21 thus rotates about the coaxial axes of shafts 21-1 and 2 while the rotor/piston 21 and counterweights 30 and 40 rotate as a unit about coaxial axes of shafts 24-1 and 26-1.
  • the unit can be dynamically balanced with the correct selection or design of the counterweights 30 and 40 using standard moment of inertia equations to balance the rotor/piston 21 with the counterweights 30 and 40. Since the gas loads change with the compression process, there will be unbalance at some time since the counterweights do not accommodate these changes. However, the initial selection of the counterweight can chose some stage of the compression stroke at which balance is established. If a liquid slug, for example, was in the trapped volume of the compressor, its incompressibility would create an excess pressure.
  • rotor/piston 21 can move away from the wall of base 20-1 of stator 20 thereby unsealing the trapped volume and permitting the rotor/piston 21 to override the liquid slug, grit, etc.
  • the rolling rotor motor/compressor 10' of FIGS. 7 and 8 is structurally identical to the rolling rotor motor/compressor 10 of FIGS. 1-6 except in the details of counterweights 130 and 140.
  • the counterweights 30 and 40 do not have a fixed axis of rotation whereas counterweights 130 and 140 do.
  • counterweights 130 and 140 have bores 130-2 and 140-2 which receive and rotate about axial shafts 24-1 and 26-1.
  • Short shafts 21-1 and 2 are received in slots 130-1 and 140-1 which permit radial movement of rotor/piston 21 without requiring movement of weight portions 130-3 and 140-3 rather than radial movement of both the rotor/piston 21 and the counterweights 30 and 40 as in the case of motor/compressor 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Brushless Motors (AREA)
  • Linear Motors (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
US07/266,425 1988-11-02 1988-11-02 Rolling rotor motor balancing means Expired - Fee Related US4900237A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US07/266,425 US4900237A (en) 1988-11-02 1988-11-02 Rolling rotor motor balancing means
JP1284664A JPH06101921B2 (ja) 1988-11-02 1989-10-31 ローリングロータ型モータ
BR898905620A BR8905620A (pt) 1988-11-02 1989-11-01 Dispositivos de balanceamento de motor de rotor de rolamento
KR1019890015792A KR920000686B1 (ko) 1988-11-02 1989-11-01 로울링 로우터 모터 균형 장치
IT02224789A IT1237677B (it) 1988-11-02 1989-11-02 Dispositivo di bilanciamento per motore elettrico con rotore a rotolamento.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/266,425 US4900237A (en) 1988-11-02 1988-11-02 Rolling rotor motor balancing means

Publications (1)

Publication Number Publication Date
US4900237A true US4900237A (en) 1990-02-13

Family

ID=23014542

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/266,425 Expired - Fee Related US4900237A (en) 1988-11-02 1988-11-02 Rolling rotor motor balancing means

Country Status (5)

Country Link
US (1) US4900237A (it)
JP (1) JPH06101921B2 (it)
KR (1) KR920000686B1 (it)
BR (1) BR8905620A (it)
IT (1) IT1237677B (it)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4118950A1 (de) * 1991-06-08 1993-02-11 Teves Gmbh Alfred Antriebsaggregat, insbesondere motorpumpenaggregat
NL1013535C2 (nl) * 1999-11-09 2001-05-11 Stichting Energie Windturbine-generatorsamenstel.
US6287092B1 (en) * 1998-03-11 2001-09-11 Tecumseh Products Company Counterweight for hermetic compressors
US6351043B1 (en) * 1999-07-02 2002-02-26 Interelectric Ag Dynamically balanced small electric motor
US20050031465A1 (en) * 2003-08-07 2005-02-10 Dreiman Nelik I. Compact rotary compressor
US20050201884A1 (en) * 2004-03-09 2005-09-15 Dreiman Nelik I. Compact rotary compressor with carbon dioxide as working fluid
US20060159570A1 (en) * 2005-01-18 2006-07-20 Manole Dan M Rotary compressor having a discharge valve
US20200307778A1 (en) * 2019-03-28 2020-10-01 Nidec Corporation Motor, rotor device, and drone

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9325218B2 (en) 2011-07-06 2016-04-26 General Electric Company Laminated rotor balancing provisions
WO2013006079A1 (en) 2011-07-06 2013-01-10 General Electric Company Laminated rotor machining enhancement

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480825A (en) * 1945-06-29 1949-09-06 Vibro Plus Corp Electric vibration motor
US2561890A (en) * 1945-07-25 1951-07-24 George C Stoddard Dynamoelectric machine
JPS5622553A (en) * 1979-07-31 1981-03-03 Masakado Ejima Variable vibration motor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480825A (en) * 1945-06-29 1949-09-06 Vibro Plus Corp Electric vibration motor
US2561890A (en) * 1945-07-25 1951-07-24 George C Stoddard Dynamoelectric machine
JPS5622553A (en) * 1979-07-31 1981-03-03 Masakado Ejima Variable vibration motor

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4118950A1 (de) * 1991-06-08 1993-02-11 Teves Gmbh Alfred Antriebsaggregat, insbesondere motorpumpenaggregat
US6287092B1 (en) * 1998-03-11 2001-09-11 Tecumseh Products Company Counterweight for hermetic compressors
US6351043B1 (en) * 1999-07-02 2002-02-26 Interelectric Ag Dynamically balanced small electric motor
NL1013535C2 (nl) * 1999-11-09 2001-05-11 Stichting Energie Windturbine-generatorsamenstel.
WO2001035517A1 (en) * 1999-11-09 2001-05-17 Stichting Energieonderzoek Centrum Nederland Wind turbine/generator assembly
US20050031465A1 (en) * 2003-08-07 2005-02-10 Dreiman Nelik I. Compact rotary compressor
US20050201884A1 (en) * 2004-03-09 2005-09-15 Dreiman Nelik I. Compact rotary compressor with carbon dioxide as working fluid
US7217110B2 (en) 2004-03-09 2007-05-15 Tecumseh Products Company Compact rotary compressor with carbon dioxide as working fluid
US20060159570A1 (en) * 2005-01-18 2006-07-20 Manole Dan M Rotary compressor having a discharge valve
US7344367B2 (en) 2005-01-18 2008-03-18 Tecumseh Products Company Rotary compressor having a discharge valve
US20200307778A1 (en) * 2019-03-28 2020-10-01 Nidec Corporation Motor, rotor device, and drone
US11548629B2 (en) * 2019-03-28 2023-01-10 Nidec Corporation Motor, rotor device, and drone

Also Published As

Publication number Publication date
IT8922247A0 (it) 1989-11-02
IT1237677B (it) 1993-06-15
JPH06101921B2 (ja) 1994-12-12
KR920000686B1 (ko) 1992-01-20
BR8905620A (pt) 1990-06-05
KR900008742A (ko) 1990-06-03
JPH02188157A (ja) 1990-07-24

Similar Documents

Publication Publication Date Title
US5123818A (en) Rolling rotor motor driven scroll compressor
US5002470A (en) Internal stator rolling rotor motor driven scroll compressor
US4900237A (en) Rolling rotor motor balancing means
JPH04272403A (ja) 最適のカプリングを有する共回転式スクロール装置
KR0142507B1 (ko) 스크롤형 유체기구
US4892467A (en) Balanced rolling rotor motor compressor
US4867652A (en) Balanced rolling rotor motor compressor
EP1657443A1 (en) Scroll compressor
CA2227682C (en) Scroll hydraulic machine
US4946353A (en) External stator rolling rotor scroll compressor
JPH0423118B2 (it)
JP2865759B2 (ja) スクロール圧縮機
JP6808044B2 (ja) スクロール圧縮機
US5080562A (en) Annular rolling rotor motor compressor with dual wipers
US4984480A (en) Rolling rotor motor balancing means
EP0085248A1 (en) Orbiting piston type fluid displacement apparatus with internal balanceweight
JPS585494A (ja) 回転型密閉圧縮機
JPH0729270Y2 (ja) 圧縮機
JP2000130320A (ja) 電動式圧縮機
JPH1122673A (ja) 回転式流体機械
JPH03281997A (ja) 縦形ロータリ圧縮機
KR100447207B1 (ko) 아우터 로터형 전동기가 구비된 스크롤 압축기
JP2021017871A (ja) 圧縮機
JP2002188588A (ja) ロータリ圧縮機
KR20010027580A (ko) 밀폐형 회전식 압축기

Legal Events

Date Code Title Description
AS Assignment

Owner name: CARRIER CORPORATION, A DE CORP., NEW YORK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:REEDY, WAYNE R.;REEL/FRAME:005008/0770

Effective date: 19881028

AS Assignment

Owner name: CARRIER CORPORATION, A CORP. OF DELAWARE, CONNECTI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:REEDY, WAYNE R.;REEL/FRAME:005657/0899

Effective date: 19910205

FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19980218

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362